Weather in Belfast in January 2025
- January is usually the coldest month of the year in Belfast;
Average weather
Average temperature in Belfast in January
The temperature in January is +46°F on average, with a range between a maximum of +55°F during the day and a minimum of +27°F at night.
The average maximum temperature goes up 19% by the end of the month, compared with the beginning of the month, from +43°F to +48°F.
Is Belfast warm or cold in January?
Belfast is typically chill in January.
Maximum temperatures go up compared to the previous month from +46°F to +46°F. The minimum temperature also goes down from +39°F to +37°F.
Pack a jumper and a jacket as there will be cooler temperatures.
January is the coldest month in Belfast, here is the comparison with other months:
Water temperature in Belfast in January
Water in Belfast in January is Cold. It varies from +46°F to +51°F, with an average of +49°F. Note that the air temperature is lower than the water temperature, averaging around +46°F.
In January, water temperatures are average relative to the rest of the year:
Can you swim in Belfast in January?
Climate in Belfast in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +46°F | +46°F | +46°F | ||||
| Min. temperature | ||||||
| +9°F | +16°F | +19°F | ||||
| Max. temperature | ||||||
| +59°F | +59°F | +59°F | ||||
| Rainfall | ||||||
| 84 mm | 75 mm | 63 mm | ||||
| Wind | ||||||
| 4 m/s | 5 m/s | 5 m/s | ||||
| Avg. water temperature | ||||||
| +51°F | +49°F | +47°F | ||||
| Humidity | ||||||
| 87% | 85% | 83% | ||||
| Air pressure | ||||||
| 1009 HPa | 1010 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 1 | 1 | 2 | ||||
| Cloudy days | ||||||
| 11 | 10 | 9 | ||||
| Rainy days | ||||||
| 18 | 18 | 16 | ||||
| Snowy days | ||||||
| 1 | 2 | 1 | ||||
January typically has worse weather conditions compared to December. The temperature levels stay the same in the area of +46°F for average maximum temperature during the day. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 84 mm to 75 mm. It feels drier, as humidity decreases from 87% to 85%. Winds are stronger in comparison to December, going up from 4 m/s to 5 m/s on average. The amount of sunny days stay about the same, averaging 1 sunny days during the month.
But maybe it is worth considering traveling in February as the weather gets better.
Wind
The average wind speed is 5 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Belfast is gradually increasing during January, going from 2 m/s to 7 m/s over the course of the month.
Rain
How was the weather last January in Belfast?
Climate Change Over the Years
The climate in Belfast in January has not changed that much over the last 43 years.
The average temperature was the lowest in 1979 (+52°F) and the highest in 1995 (+57°F). The driest year was 2003 with only 711 mm of rainfall, and the wettest year was 2019 with 1255 mm.
FAQ
Is January a good time to visit Belfast?
Can you sunbathe in Belfast in January?
Can you swim in Belfast in January?
Is Belfast rainy in January?
Is it sunny in Belfast in January?
Other cities in United Kingdom
Monthly weather in Belfast
Source of the data
For this page, we’ve looked at the typical weather in Belfast, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.